Shield attachment for incandescent lamps.



J. F SCOTT. SHIELD ATTACHMENT FOR INCANDESCENT LAMPS.

APPLICATION FILED JAN. 10, I916.

Patented Sept; 19, 1916.

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SHIELD ATTACHMENT F03 INCANDESGENT LAMPS.

Application filed January 10, 1916.

T 0 all whom i z? 'm (43 concern Be it known that I, J OHN F. Scorr, a citi- Zen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Shield Attachment for Incandescent Lamps, of which he following is a specification.

1n the arrangement of electric lights for the lighting of rooms, it is especially desirable that the light rays from individual lamps be considerably diffused in order that pei'sons-p'orking in the lighted rooms may not have their eyes unnecessarily tired. This is especially true with the comparatively brilliant lamps of the nitrogen type, and it is the object of my present invention to provide a simple, efficient, and cheap means for accomplishing the desired diffusion, and one readily applicable to existing types of lamps.

The accompanying drawings illustrate my invention.

Figure 1 is a side elevation of a standard lamp equipped with my improved diffusing shield, the usual socket and shade being shown in dotted lines; Fig. 2 is a perspective detail of one foot of my improved holder; and Fig. 3 is a fragmentary section of the translucentshield and a fragment of one of the legs of the holder.

In the drawings, 10 indicates a standard socket which may carry any desired downwardly deflecting shade 11. The lamp 1:2 is a standard lamp provided with a plug 13 for insertion into the socket 10, and, as is commen with the larger commercial lamps of the present day, has a cylindrical portion l t immediately adjacent the plug 13. Incasing the main body of lamp 12 is a translucent diffusing shield 15 which preferably lies fairly close to the main body of the lamp and has an axial extent sufiicient to intercept all of those light rays emanating from the incandescent filament 16 which are directed below the horizontal plane of the filament and preferably sufficient to intercept all of the light rays emanating from this filament which would proceed to points outside the field of shade 11. In other words, the shield 15 projects axially of the lamp at least to the plane of the filament, and preferably some what beyond such plane. The shield 15 is conveniently formed of a glass commonly called opal and is substantially semispherical in shape. around its open end or edge is an inwardly turned flange 17, just Specification of Letters Patent.

Patented Sept. 19, 1916.

Serial No. 71,144.

below which is an annular channel 18 concave inwardly.

The shield 15'is firmly supported in place by a simple holder, which in the form illustrated is directly supported by the lamp 12 itself, as distinguished from the permanently connected socket 10. This holder is formed from a single piece of wire which at its middle is turned into a coil 19 of one and one-half turns, fitting around a cylindrical part near the plug end of the lamp; in the form shown this cylindrical part is the cylindrical portion 14 of the lamp itself. The ends of this coil are then turned downwardly and outwardly in the general direction of the axis of the coil to form flaring legs 20, each of which, at its end, is first turned at right angles to the leg 20 to form a short length 21, then doubled back upon the portion 21 into a portion 22 of about twice the length of the portion 21, and then turned back, in the plane of the portions 21 and 22, to form a portion 23 which is in alinement with the portion 21 and extends substantially to the main body of the leg 20, the portions 21 and 23 thus forming a short outwardly projecting and tangentially extending shelf-like foot capable of extending into the annular channel 18 of the shield 15. The holder is made of spring wire of comparatively small diameter, so that it is comparatively inconspicuous, and the legs 20 may be sprung toward each other by a slight pres sure to permit the insertion of the two feet into the channel of the shield. The holder and shield together may be removed or replaced with the lamp.

1 claim as my invention:

1. As an article of manufacture, a holder for incandescent lamp shields, said holder comprising a single piece of spring wire bent at its middle into a helix to form a clamping portion adapted to surround and be supported by a cylindrical part adjacent the plug end of a standard incandescent lamp, said middle portion having its oppositely extended ends turned in the general direction of the axis of said middle portion but flaring outwardly therefrom and provided at their free ends with portions bent to form tangentially extending shelves adapted to engage and hold a shield by the spring of said wire.

2. In combination, a holder for incandescent lamp shields, said holder comprlsing a single piece of spring wire bent at its midrlle into a helix to form a portion adapted to surround and be supported by a cylindriadapted to incase the end of such a lamp and 10 cal part adjacent the plug end of a standard having at its edge an inturned flange under incandescent lamp. said middle portion havwhich such feet project.

ing its oppositely extended ends turned in In Witness whereof, I have hereunto set the general direction of the axis of said midmy hand at Indianapolis, Indiana, this dle portion but flaring outwardly therefrom fourth day of January, A. D. one thousand 15 and having their free ends bent into outnine hundred and sixteen.

Wardly projecting and tangentially extending shelf-like feet, and a bowl-shaped shield JOHN F. SCOTT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

